Home-baked cookies are a beloved treat, but a common problem with these kind of cookies is drying out. Unless special care is taken, home-baked cookies often dry out and become hard and crunchy after a couple of days. Fortunately, there are a couple of steps you can take to prevent this from happening to your cookies.
Add a little extra butter to the recipe. Tweak the ingredients just slightly to cut back on the dry ingredients and bump up the moist ones.
Monitor the cookies as they bake per your recipe's directions. Be sure not to let them brown too much, because a burnt cookie is never going to be a soft cookie.
When you remove the cookies from the oven, allow them to cool for a minute or two on the cookie sheet so they can finish setting up. Use a spatula to transfer them to a cooling rack, and leave them there for 10 to 15 minutes before transferring the cookies to your plastic container or airtight jar.
Finally, tear a piece of bread -- about a quarter of a slice -- and put it in the cookie container. The cookies will absorb the moisture from the bread. If you have your doubts, try it. In a few days, the bread will just be a crunchy crouton. When the bread is crunchy, toss it out and throw in a new one.